Code:
public class DoubleLink1 implements CellPhoneShell { private NodeData head; private NodeData tail; public DoubleLink1() { this.tail = null; this.head = null; } public void add(Contact data)
public class DoubleLink1 implements CellPhoneShell { private NodeData head; private NodeData tail; public DoubleLink1() { this.tail = null; this.head = null; } public void add(Contact data)
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